JPH056106Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a hopper device for distributing raw materials in a foam molding machine.

(Prior art and its problems) Generally, in a foam molding machine, pre-foamed granular raw material 5 is stored in a maturing silo, and after completion of maturing, it is blown to a raw material distribution hopper 1 provided in the molding machine to distribute the raw material. It is fed from a mold hopper 1 through a filler into a mold cavity space, and is heated and cooled to produce a molded product.

As shown in FIGS. 5 and 6, the distribution hopper 1 used in this foam molding machine has a raw material supply port 2 on the top surface of the hopper main body 1a, which has a rectangular horizontal cross section, and a plurality of distribution ports for taking out the raw material 5 on the bottom surface. 3 are arranged in series, and the distribution port 3 is opened and closed by sliding a rectangular plate-shaped slide shutter 16 having a protruding port 18 corresponding to the distribution port 3 back and forth.

7 and 8 show another conventional example in which a disc-shaped slide shutter 17 rotates to open and close the distribution port 3 as described above.

However, in both cases, slide shutter 1
While 6 and 17 are being operated repeatedly, the granular raw material 5 gets caught in the small gap between the slide shutters 16 and 17 and the entrance of the distribution port 3, fixing the slide shutters 16 and 17, and the slide There was a drawback that the shutters 16 and 17 sometimes stopped operating, and the automatic molding operation was interrupted unless the stuck granular raw material 5 was removed.

(Purpose of the invention) The present invention was devised in view of the drawbacks of the conventional examples, and its purpose is to create a foam molding machine that does not suffer from malfunctions such as stoppages due to biting of granular raw materials. The present invention provides a hopper device for distributing raw materials in a hopper.

(Means for solving the problem) In order to achieve the above object, the present invention provides a raw material supply port 2 at the center of the upper surface of the hopper 1.

A raw material distribution port 3 is provided at the bottom 1c of the hopper 1.

An opening/closing plate 4 is provided in the hopper 1, which moves up and down above the raw material distribution port 3 to open and close the raw material distribution port 3.

; is adopted as a technical means.

(Function) Granular raw material 5 is supplied to hopper 1 through raw material supply port 2 .

The supplied granular raw material 5 is deposited not only on the opening/closing plate 4 but also in the hopper 1.

When a raw material 5 supply start signal is input from a control section (not shown), the opening/closing plate 4 is raised and the raw material distribution port 3 is opened.

As the opening/closing plate 4 rises, the granular raw material 5 collapses and flows toward the raw material distribution port 3, and is supplied and filled into the mold cavity space (not shown) by the suction of a filler (not shown). Ru.

After the filling of the granular raw material 5 is completed and the raw material supply port 2 of the mold (not shown) is closed, the suction air of the filler that sucks the granular raw material 5 using the bench-lily effect is extended for a slightly longer time. After the residual raw material 5 from the distribution port 3 to the filler is blown back to the hopper 1, a lowering signal for the opening/closing plate 4 is input from the control section, and the opening/closing plate 4 is lowered to close the raw material distribution port 3. .

As a result, the granular raw material 5 remaining below the opening/closing plate 4 is also blown away and does not remain, and the raw material distribution port 3 is finally completely closed by the opening/closing plate 4.

Incidentally, the granular raw material 5 in the hopper 1 is stirred by the blowback, and the granular raw material 5 is divided by the difference in specific gravity.
segregation will be eliminated.

(Example) Hereinafter, the present invention will be described in detail according to the illustrated example.
1 to 3 show one embodiment of the present invention, in which a hopper 1 is composed of a square box-shaped hopper main body 1a and a top cover 1b fitted into an opening on the top surface. Upper lid 1b
An air feed pipe outlet fixing part 6 made of wire mesh is attached to the central part of the pipe, and an inverted T-shaped raw material supply port 2 is attached to the center of the interior thereof. The hopper 1 functions to store the pre-foamed granular raw material 5 blown through the raw material supply port 2 and to supply the granular raw material 5 to the mold cavity space via the filler. At the center of the bottom 1c of the hopper main body 1a is an elevating cylinder 8 fixed by a mounting bracket 7, and an opening/closing plate 4 is attached to the cylinder rod of the elevating cylinder 8. A bracket 9 is bolted to the center of the opening/closing plate 4, and the cylinder rod is fixed to this bracket 9. The hopper main body 1a, the upper lid 1b, and the opening/closing plate 4 are usually made of aluminum plates, but of course they are not limited to this. Further, the metal may be exposed on the lower surface of the opening/closing plate 4, but a rubber plate may be attached to the lower surface to improve adhesion and scratch resistance. A lifting cylinder 8 is provided at the bottom 1c of the hopper body 1a.
4 to 16 concentric circles (that is, the raw material supply port 2 is located above the lifting cylinder 8).
raw material distribution ports 3 are arranged. As can be seen from the figure, the raw material distribution port 3 may be raised slightly higher than the bottom surface, or, although not shown, the opening may be sharply pointed like a knife, enlarged like a morning glory, or conversely shaped like a conical shape. You can narrow it down to a shape. This raw material distribution port 3 is connected to the mold cavity space through a vinyl hose 10 and a filler. The level meter 11 is provided on the side of the hopper body a, and functions to detect the storage amount of the pre-foamed granular raw material 5, and when the storage amount decreases, it supports automatic supply of the granular raw material 5. ing. 12 is a ventilation window 12
So, Saran net etc. have been set up, and Hopper 1
It helps drying and ripening the granular raw material 5 stored in the container. Reference numeral 13 denotes a cleaning opening 13 provided at the bottom 1c of the hopper main body 1a, which is normally closed with a closing plate 14.

Accordingly, the pre-foamed granular raw material 5, which has been blown from the maturing silo (not shown) according to the instructions from the level meter 11, is transported to the hopper body 1a including the opening/closing plate 4.
The pneumatic air that has blown the granular raw material 5 is exhausted to the outside through the exhaust hole 15 drilled in the pneumatic pipe outlet fixing part 6. It is. When the granular raw material 5 sequentially supplied in this manner reaches a predetermined amount, the level meter 11 described above operates to stop the supply of the granular raw material 5.

On the other hand, when a signal to start supplying the raw material 5 to the mold is input from the control section, the lifting cylinder 8 is activated to raise the opening/closing plate 4 and open the raw material distribution port 3. Then,
As the opening/closing plate 4 rises, the granular raw material 5 flows from around the opening/closing plate 4 toward the bottom 1c of the hopper body 1a, is evenly sucked into the distribution port 3 by the suction force of the filler, and enters the mold cavity space. Supplied and filled.

When the supply and filling of the granular raw material 5 into the mold cavity space is completed, the raw material supply port 2 of the mold is closed.
After that, the suction air of the filler, which sucks the granular raw material 5 using the bench lily effect, is slightly extended for a slightly longer period of time, and the residual raw material 5 from the distribution port 3 to the filler is blown back to the hopper 1. A lowering signal for the opening/closing plate 4 is input from the control section, and the opening/closing plate 4 is lowered to close the raw material distribution port 3. As a result, the granular raw material 5 remaining below the opening/closing plate 4 is also blown away and does not remain, and the raw material distribution port 3 is finally completely closed by the opening/closing plate 4.

Incidentally, the granular raw material 5 in the hopper 1 is agitated each time by the blowback, and segregation of the granular raw material 5 due to the difference in specific gravity is eliminated.

Granular raw material 5 filled in the mold cavity space
is heat-formed, cooled and discharged, and a granular raw material 5 for the joint is supplied. The foam molding operation progresses by repeating this series of operations.

(Effects) As described above, the present invention provides a raw material supply port at the center of the top surface of the hopper, and a raw material distribution port at the bottom of the hopper, which moves up and down above the raw material distribution port to open and close the raw material distribution port. Since the plate is installed inside the hopper, the opening/closing plate moves up and down in the direction toward and away from the raw material distribution port, creating a narrow gap between the raw material distribution port and the raw material distribution port where granular raw materials can get caught. This has the advantage that the operation of the entire apparatus is not forced to stop due to malfunction of the opening/closing plate, and continuous and smooth work is guaranteed.

[Brief explanation of the drawing]

Fig. 1...Longitudinal sectional view of the hopper of the present invention, Fig. 2
Figures...Front view of the hopper of the present invention, Figure 3...Bottom view of the hopper of the present invention, Figures 4a and b...Schematic sectional views showing the operating state of other embodiments of the present invention, Figure 5. Fig. 6... A horizontal sectional view of Fig. 5, Fig. 7... A longitudinal sectional view of another embodiment,
FIG. 8...A horizontal sectional view of FIG. 7. 1...Hopper, 1a...Hopper body, 1b
...Top lid, 1c...Bottom, 2...Raw material supply port, 3
... Raw material distribution port, 4 ... Opening/closing plate, 5 ... Granular raw material, 6 ... Pneumatic feed outlet fixing part, 7 ... Mounting bracket, 8
...Lifting cylinder, 9...Bracket, 10...
... Vinyl hose, 11 ... Level meter, 12 ... Communication window, 15 ... Cleaning port, 14 ... Closure plate, 15 ...
...Exhaust hole, 16... Rectangular plate-shaped slide shutter, 17... Disc-shaped slide shutter, 18...
Doorway.

Claims (1)

[Claims for Utility Model Registration] (1) A hopper having a raw material supply port for supplying pre-expanded resin particles at the top, a raw material distribution port at the bottom, and a resin particle feeding path connected to the distribution port; ,
The above-mentioned feeding path and the mold filling port are connected, and particles are sucked through the feeding path and filled into the mold by the Ventury effect, and after filling, the particles are blown back to the feeding path with the mold filling port closed. This is a hopper device for a foam molding machine that is equipped with a filler configured to allow the hopper to have a raw material supply port at the center of the upper surface of the hopper, and a raw material distribution port at the bottom of the hopper. An opening/closing plate for opening and closing the opening is provided in the hopper, and with the opening/closing plate raised to open the raw material distribution opening, the pre-foamed resin particles are sucked into the feeding path by the ventilly effect and filled into the mold. ,
A hopper device for distributing raw material in a foam molding machine, characterized in that after filling, the residual resin particles in the feeding path and below the opening/closing plate are removed by the blowback, and then the opening/closing plate is lowered to close the raw material distribution port. (2) In the foam molding machine according to claim 1, which is characterized in that a plurality of raw material distribution ports are provided concentrically with respect to the raw material supply port below the raw material supply port. Hopper equipment for raw material distribution.